Publication Summary

Title

DRAFT Western Washington Hydrology Model Version 2.1 User's Manual

Month-Year PublishedMay 2003
Online Availability
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Short Description

The WWHM 2 is the 2nd edition of the Western Washington Hydrology Model. It was designed by the Washington State Department of Ecology and AQUA TERRA Consultants. This version is faster, more flexible and in many ways easier to use than its predecessor. Because of its flexibility you can now model a wide variety of projects including multiple basin models, water quality, and detention facility design.

Size storm water control facilities that mitigate the effects of increased runoff (peak discharge, duration, and volume) from a proposed development on a stream using a computer model that represents the following:

• a uniform method for western Washington
• a more accurate method than single event design storms
• an easy–to–use software package

(Also see abstract below)
Publication Number03-10-036
Author(s)AQUA TERRA Consultants
Print Availability Not available as a printed document
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Number of pages 57
Keywords environmental, hydrology, manual, model, quality, water
Related Web Content Western Washington Hydrology Model Version 2
Abstract Long Description

The WWHM 2 is the 2nd edition of the Western Washington Hydrology Model. It was designed by the Washington State Department of Ecology and AQUA TERRA Consultants. This version is faster, more flexible and in many ways easier to use than its predecessor. Because of its flexibility you can now model a wide variety of projects including multiple basin models, water quality, and detention facility design.

Size storm water control facilities that mitigate the effects of increased runoff (peak discharge, duration, and volume) from a proposed development on a stream using a computer model that represents the following:

• a uniform method for western Washington
• a more accurate method than single event design storms
• an easy–to–use software package

The computer program is based on:

• continuous simulation hydrology (HSPF)
• actual recorded precipitation
• measured pan evaporation
• historic vegetation
• regional HSPF parameters

Parameter values can be modified for local conditions.

To download the Western Washington Hydrology Model, please visit our website at: http://www.ecy.wa.gov/programs/wq/stormwater/wwhm_training/wwhm/wwhm_v2/instructions_v2.html

If you have questions about the WWHM, please contact:
Foroozan Labib, Environmental Engineer
Department of Ecology
Water Quality Program
(360) 407-6439
flab461@ecy.wa.gov

This page last updated August 11, 2011